Leases - Maturity (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
2020	$ 1,472
2021	1,499
2022	1,525
2023	1,552
2024	1,179
Total future minimum lease payments	7,227
Less imputed interest	(1,220)
Total	$ 6,007
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent us-gaap:OtherLiabilitiesNoncurrent
Accrued expenses
Lessee, Lease, Description [Line Items]
Total	$ 1,033
Other long-term liabilities
Lessee, Lease, Description [Line Items]
Total	$ 4,974